Lithium is stored in paraffin. Is paraffin liquid or solid? What is the density of paraffin
Solid state, density 0.9 * 1000kg / m ^ 3
A liquid with a density of 0.8 g / cm3, 40 cm3, is mixed with another liquid with a density of 1.2 g / cm3, 20 cm3,
After mixing, the volume is 90% of the original volume. Calculate the density of the mixture!
(0.8x40+1.2x20)/((40+20)X0.9)
A hollow aluminum sphere with a mass of 270g and a volume of 150cm & sup3;, if the hollow part is filled with water, what is the total mass? (the density of aluminum is 2.7g/cm&
From ρ = m / V, v = m / ρ can be used to calculate the volume of 270g aluminum: v = m aluminum / ρ aluminum = 270g / (2.7g / M & sup3;) = 100cm & sup3;; from V air = V ball-v aluminum to calculate the volume of hollow: V air = v ball-v aluminum = 150cm & sup3; - 100cm & sup3; = 50cm & sup3;; from ρ = m / V, M = ρ V to calculate the mass of water injection: m water = ρ water V water